WS3412 Datasheet, PDF (1/8 Pages) Shenzhen Winsemi Microelectronics Co., Ltd – WS3412 Active PFC Non-isolated Buck LED Driver

WS3412 Product Description
WS3412 Active PFC Non-isolated Buck LED Driver
Features
� High Power Factor Correction, Low Total Harmonic
Distortion
� Dynamic Temperature Compensation
� 550V Power MOSFET Integrated
� No Auxiliary Winding For Supplying
� SOP8 Package, Up To 260mA Output Current
� Valley Switching, High efficiency, Low EMI
� Automatic Compensate the Inductance Variation
� Automatic Adapt to the Change of Output Voltage
� LED Short Circuit Protection
� Over Voltage Protection
� Over Temperature Protection
� Open Circuit Protection
� Few External Components
Applications
� LED Driver Supply
Typical Application Circuit
General Description
The WS3412 is designed for active PFC non-isolated buck
LED driver. It operates at valley switching mode with high
efficiency, low EMI and High PF. The output current
automatically adapt to the variation of the inductance and the
output voltage. The truly constant current LED is realized.
The WS3412 integrates 550V power MOSFET, using SOP 8
package, producing up to 260mA output current.
It can achieve excellent constant current performance with
very few external components.
The WS3412 offers rich protection functions, including over
voltage protection, LED short circuit protection, cycle by cycle
current limiting, dynamic temperature compensation, over
temperature protection and soft start.
WS3412 consumes very low start current and operation
current, driving LED efficiently under universal AC
input(85VAC~265VAC).
WS3412 is available in SOP8 package.
5_D
8
CS
6_D
CS ⁷
3 _VCC
4
FB
AC
2 _GND
COMP ¹
LED+
LE D-
WIN SEM I M ICROELECTRON ICS
WIN SEM I M ICROELECTRON ICS
WIN SEM I M ICROELECTRON ICS
Copyr ight@Winsemi Microelectronics Co., Ltd., All right reserved.
WIN SEM I M ICROELECTRON ICS
W/T-S031-Rev.A/ 0 Nov.2013
WIN SEM I M ICROELECTRON ICS
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